Advertisements
Advertisements
प्रश्न
Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?
Advertisements
उत्तर
Kinetic energy of a body is directly proportional to the mass and square of velocity of the moving body. So, doubling the velocity will have a greater effect on the kinetic energy of a body.
APPEARS IN
संबंधित प्रश्न
A bullet of mass 50 g is moving with a velocity of 500 m s−1. It penetrated 10 cm into a still target and comes to rest. Calculate:
- the kinetic energy possessed by the bullet, and
- the average retarding force offered by the target.
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
By how much will the kinetic energy of a body increase if its speed is doubled?
A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the ground? (g = 9.8 m/s2)
Two objects having equal masses are moving with uniform velocities of 2 m/s and 6 m/s respectively. Calculate the ratio of their kinetic energies.
A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
The momentum of a bullet of mass 20 g fired from a gun is 10 kg.m/s. The kinetic energy of this bullet in kJ will be :
Which of the following does not posses the ability to do work not because of motion?
Find out the form of energy possessed by the following thing.
Water falls
The energy possessed by a cricket ball bowled by a player is ______.
